Our samples were analyzed by scanning electron microscopy
(SEM) coupled by energy dispersive X-ray spectroscopy
(EDX) and transmission electron microscopy (TEM). The
application of these techniques made it possible to visualize
the surface morphology of adsorbents. The images (3a) of
microscopy SEM (Fig. 3) show a porous aspect which facilitates
materials adsorption. In addition, spectrum EDX (3b)
shows the presence of elements which were previously quoted
to know Al, Si, Na, Mg, Fe and Ca. This result confirms the
validity of the X-ray fluorescence analysis. TEM examination
of pyrophyllite that was presented in the same Fig. 3, images
(3c and 3d) shows that the lamellate of laminated form is distributed
well; it is noticed that each leaf consists of a poisoned
aluminum octahedral layer between two tetrahedral layers of
silica